Technical data

BIOS and System Programming
80 VIPA GmbH CP486 ⋅ 00/14
4.4.2 I/O Address Assignment
000-01F DMA controller 1
020-03F interrupt controller 1
040-05F timer 8254
060 keyboard controller
061 port B register, PPI, 8255
062-06F keyboard controller
070-07F real time clock and CMOS-RAM, NMI mask
080-08F DMA page register
090-091 DMA map register
092 alternate gate A20 and hot reset
093-09F DMA map register
0A0-0BF interrupt controller 2
0C0-0DF DMA controller 2
0F0 clear math coprocessor busy
0F1 reset math coprocessor
0F8-0FFmath coprocessor
102-104 VGA controller
1EC-1EF HT21 EMS- and control register
1F0-1F8 hard disk
270-277 backup logic and watchdog
278-27F LPT2
280 VIPA CP status register
281 VIPA-PLC status register
282 VIPA control register
283-28F reserved for VIPA register
2E8-2EF COM4
2F8-2FF COM2
378-37B LPT1 (applicable after corresp. conf. of Combo)
3B0-3BB VGA controller
3BC-3BF LPT1
3C0-3DF VGA controller
3E8-3EF COM3
3F0-3F7 FD controller
3F8-3FF COM1
46E8 VGA controller